Keywords: Budrin Piotr.jpg ru Буд� ин Пет� Васильевич 1857 � 1939 � � усский и советский аг� оном-� астениевод http //historiaiung pulawy pl/Biogramy php author before 1939 1857 births 1939 deaths Scientists from the Soviet Union Scientists from Russia unidentified field PD-old |